The Spider Fire Veriable 77mm ND Filter XSP MRC UV 010M Filter is a general use, clear filter that helps to absorb ultraviolet light and reduce the bluish cast of daylight. No additional coloration or contrast is provided, allowing you to pair this filter with others.
The UV filter is also useful as a general protective filter to leave on lenses at all times. Filters help to reduce dust and moisture from reaching your lens element and provide additional protection in case of drops or situations where scratching could occur.
MRC coating remains clean longer, can be wiped clean a lot easier and is resistant to scratching.